8a16b7a18f
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357 lines
7.6 KiB
C
357 lines
7.6 KiB
C
/* $OpenBSD: courier.c,v 1.15 2006/03/17 19:17:13 moritz Exp $ */
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/* $NetBSD: courier.c,v 1.7 1997/02/11 09:24:16 mrg Exp $ */
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/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1986, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)courier.c 8.1 (Berkeley) 6/6/93";
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static const char rcsid[] = "$OpenBSD: courier.c,v 1.15 2006/03/17 19:17:13 moritz Exp $";
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#endif
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#endif /* not lint */
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/*
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* Routines for calling up on a Courier modem.
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* Derived from Hayes driver.
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*/
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#include "tip.h"
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#include <sys/ioctl.h>
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#include <stdio.h>
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#define MAXRETRY 5
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static int dialtimeout = 0;
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static int connected = 0;
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static jmp_buf timeoutbuf;
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static void sigALRM(int);
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static int cour_swallow(char *);
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static int cour_connect(void);
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static int coursync(void);
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static void cour_write(int, char *, int);
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static void cour_nap(void);
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#ifdef DEBUG
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static void cour_verbose_read(void);
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#endif
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int
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cour_dialer(char *num, char *acu)
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{
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char *cp;
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#ifdef ACULOG
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char line[80];
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#endif
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struct termios cntrl;
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if (boolean(value(VERBOSE)))
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printf("Using \"%s\"\n", acu);
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tcgetattr(FD, &cntrl);
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cntrl.c_cflag |= HUPCL;
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tcsetattr(FD, TCSAFLUSH, &cntrl);
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/*
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* Get in synch.
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*/
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if (!coursync()) {
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badsynch:
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printf("can't synchronize with courier\n");
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#ifdef ACULOG
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logent(value(HOST), num, "courier", "can't synch up");
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#endif
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return (0);
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}
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cour_write(FD, "AT E0\r", 6); /* turn off echoing */
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sleep(1);
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#ifdef DEBUG
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if (boolean(value(VERBOSE)))
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cour_verbose_read();
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#endif
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tcflush(FD, TCIOFLUSH);
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cour_write(FD, "AT C1 E0 H0 Q0 X6 V1\r", 21);
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if (!cour_swallow("\r\nOK\r\n"))
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goto badsynch;
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fflush(stdout);
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cour_write(FD, "AT D", 4);
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for (cp = num; *cp; cp++)
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if (*cp == '=')
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*cp = ',';
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cour_write(FD, num, strlen(num));
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cour_write(FD, "\r", 1);
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connected = cour_connect();
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#ifdef ACULOG
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if (dialtimeout) {
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(void)snprintf(line, sizeof line, "%ld second dial timeout",
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number(value(DIALTIMEOUT)));
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logent(value(HOST), num, "cour", line);
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}
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#endif
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if (dialtimeout)
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cour_disconnect();
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return (connected);
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}
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void
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cour_disconnect(void)
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{
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/* first hang up the modem*/
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ioctl(FD, TIOCCDTR, 0);
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sleep(1);
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ioctl(FD, TIOCSDTR, 0);
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coursync(); /* reset */
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close(FD);
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}
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void
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cour_abort(void)
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{
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cour_write(FD, "\r", 1); /* send anything to abort the call */
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cour_disconnect();
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}
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/*ARGSUSED*/
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static void
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sigALRM(int signo)
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{
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printf("\07timeout waiting for reply\n");
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dialtimeout = 1;
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longjmp(timeoutbuf, 1);
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}
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static int
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cour_swallow(char *match)
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{
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sig_t f;
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char c;
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f = signal(SIGALRM, sigALRM);
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dialtimeout = 0;
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do {
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if (*match =='\0') {
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signal(SIGALRM, f);
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return (1);
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}
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if (setjmp(timeoutbuf)) {
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signal(SIGALRM, f);
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return (0);
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}
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alarm(number(value(DIALTIMEOUT)));
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read(FD, &c, 1);
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alarm(0);
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c &= 0177;
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#ifdef DEBUG
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if (boolean(value(VERBOSE)))
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putchar(c);
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#endif
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} while (c == *match++);
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#ifdef DEBUG
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if (boolean(value(VERBOSE)))
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fflush(stdout);
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#endif
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signal(SIGALRM, SIG_DFL);
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return (0);
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}
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struct baud_msg {
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char *msg;
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int baud;
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} baud_msg[] = {
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{ "", B300 },
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{ " 1200", B1200 },
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{ " 2400", B2400 },
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{ " 9600", B9600 },
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{ " 9600/ARQ", B9600 },
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{ 0, 0 },
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};
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static int
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cour_connect(void)
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{
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char c;
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int nc, nl, n;
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char dialer_buf[64];
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struct baud_msg *bm;
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sig_t f;
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if (cour_swallow("\r\n") == 0)
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return (0);
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f = signal(SIGALRM, sigALRM);
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again:
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nc = 0; nl = sizeof(dialer_buf)-1;
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bzero(dialer_buf, sizeof(dialer_buf));
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dialtimeout = 0;
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for (nc = 0, nl = sizeof(dialer_buf)-1 ; nl > 0 ; nc++, nl--) {
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if (setjmp(timeoutbuf))
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break;
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alarm(number(value(DIALTIMEOUT)));
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n = read(FD, &c, 1);
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alarm(0);
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if (n <= 0)
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break;
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c &= 0x7f;
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if (c == '\r') {
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if (cour_swallow("\n") == 0)
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break;
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if (!dialer_buf[0])
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goto again;
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if (strcmp(dialer_buf, "RINGING") == 0 &&
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boolean(value(VERBOSE))) {
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#ifdef DEBUG
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printf("%s\r\n", dialer_buf);
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#endif
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goto again;
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}
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if (strncmp(dialer_buf, "CONNECT",
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sizeof("CONNECT")-1) != 0)
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break;
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for (bm = baud_msg ; bm->msg ; bm++)
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if (strcmp(bm->msg,
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dialer_buf+sizeof("CONNECT")-1) == 0) {
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struct termios cntrl;
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tcgetattr(FD, &cntrl);
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cfsetospeed(&cntrl, bm->baud);
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cfsetispeed(&cntrl, bm->baud);
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tcsetattr(FD, TCSAFLUSH, &cntrl);
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signal(SIGALRM, f);
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#ifdef DEBUG
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if (boolean(value(VERBOSE)))
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printf("%s\r\n", dialer_buf);
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#endif
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return (1);
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}
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break;
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}
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dialer_buf[nc] = c;
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#ifdef notdef
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if (boolean(value(VERBOSE)))
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putchar(c);
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#endif
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}
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printf("%s\r\n", dialer_buf);
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signal(SIGALRM, f);
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return (0);
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}
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/*
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* This convoluted piece of code attempts to get
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* the courier in sync.
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*/
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static int
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coursync(void)
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{
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int already = 0;
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int len;
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char buf[40];
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while (already++ < MAXRETRY) {
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tcflush(FD, TCIOFLUSH);
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cour_write(FD, "\rAT Z\r", 6); /* reset modem */
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bzero(buf, sizeof(buf));
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sleep(1);
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ioctl(FD, FIONREAD, &len);
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if (len) {
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len = read(FD, buf, sizeof(buf));
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#ifdef DEBUG
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buf[len] = '\0';
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printf("coursync: (\"%s\")\n\r", buf);
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#endif
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if (strchr(buf, '0') ||
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(strchr(buf, 'O') && strchr(buf, 'K')))
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return(1);
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}
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/*
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* If not strapped for DTR control,
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* try to get command mode.
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*/
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sleep(1);
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cour_write(FD, "+++", 3);
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sleep(1);
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/*
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* Toggle DTR to force anyone off that might have left
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* the modem connected.
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*/
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ioctl(FD, TIOCCDTR, 0);
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sleep(1);
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ioctl(FD, TIOCSDTR, 0);
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}
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cour_write(FD, "\rAT Z\r", 6);
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return (0);
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}
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static void
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cour_write(int fd, char *cp, int n)
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{
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#ifdef notdef
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if (boolean(value(VERBOSE)))
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write(1, cp, n);
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#endif
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tcdrain(fd);
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cour_nap();
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for ( ; n-- ; cp++) {
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write(fd, cp, 1);
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tcdrain(fd);
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cour_nap();
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}
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}
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#ifdef DEBUG
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static void
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cour_verbose_read(void)
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{
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int n = 0;
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char buf[BUFSIZ];
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if (ioctl(FD, FIONREAD, &n) < 0)
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return;
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if (n <= 0)
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return;
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if (read(FD, buf, n) != n)
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return;
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write(1, buf, n);
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}
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#endif
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/* Give the courier 50 milliseconds between characters */
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static void
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cour_nap(void)
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{
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struct timespec ts;
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ts.tv_sec = 0;
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ts.tv_nsec = 50 * 1000000;
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nanosleep(&ts, NULL);
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}
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